What does the fluid mosaic model describe?

The fluid mosaic model describes the dynamic arrangement of membrane components, highlighting the flexible and varied nature of the plasma membrane. According to this model, the cell membrane is not a static structure; instead, it is made up of a bilayer of phospholipids in which various proteins float, giving it a "mosaic" appearance. This fluidity allows proteins to move laterally within the layer, enabling a range of functions such as signaling, transport, and cell recognition.

This concept also suggests that the membrane can change shape and composition in response to different cellular conditions and functions, which is crucial for processes like endocytosis and communication between cells. By emphasizing the dynamic interactions and arrangements of lipids and proteins, the fluid mosaic model provides a comprehensive understanding of how cellular membranes operate in a living system.